The Alto-Shaam RL-33558 relay is rated for 12VDC operation and is used in designated commercial foodservice equipment control circuits. A relay uses an electrical signal to switch another circuit according to its specifications. Correct identification depends on the coil rating, contact arrangement, and terminal configuration matching the original component. https://partsfe.com/vac-12vdc-relay-for-alto-shaam-part-rl-33558/1-RL-33558.html